氧化石墨烯/酚醛树脂原位复合材料的热性能和动态力学性能  

Thermal and Dynamic Mechanical Properties of Graphene Oxide/Phenol Formaldehyde Resin In-Situ Composites

作　　者：徐伟华[1] 韦春[1] 刘红霞[1] 余传柏[1] 苏乐[1] 曾思华[1] 

机构地区：[1]桂林理工大学有色金属及材料加工新技术教育部重点实验室材料科学与工程学院,广西桂林541004

出　　处：《高分子材料科学与工程》2013年第5期79-82,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51163003;51163004);广西自然科学基金资助项目(2010GXNSFA013030;2012GXNSFBA053153;2012GXNSFBA053155);广西科技厅项目(11-031-03-08)

摘　　要：采用改进的Hummers法制备氧化石墨烯(GO),通过超声分散与苯酚、甲醛进行原位聚合,将所得原位聚合树脂与其它填料一起通过辊炼、模压成型制备GO/酚醛树脂(PF)原位复合材料。研究GO含量对GO/PF原位复合材料的热性能、力学性能、动态力学性能、蠕变和应力松弛的影响,使用扫描电子显微镜(SEM)观察复合材料的冲击断面形貌。研究结果表明,当GO加入量为1%时,GO/PF原位复合树脂的初始热分解温度比纯酚醛树脂(PF)提高了55.8℃;当GO加入量为0.25%时,GO/PF原位复合材料的冲击强度提高18.6%;当GO加入量为0.5%时,GO/PF原位复合材料的储能模量比纯PF复合材料提高78.3%,Tg提高了8.9℃。SEM观察发现,GO/PF原位复合材料的冲击断面凹凸不平,表明GO的加入能有效提高PF复合材料的力学性能。Graphene oxide （GO）was synthesized by a modified Hummers method, and GO/PF composites were prepared through in-situ polymerization with phenol formaldehyde （PF） resin. The thermal properties, mechanical properties, dynamic mechanical thermal analysis, creep and stress relaxation behavior of GO/PF in-situ composites with different contents of GO were studied. The impact section of the composites was observed by scanning electron microscope （SEM）. The results show that GO can be well dispersed in the PF matrix, after in-situ polymerization and the addition of GO improves the thermal, mechanical and dynamical mechanical thermal performance. When GO loading contents is 1%, the initial decomposition temperature increases by 55.8 ℃. When GO loading contents is 0.25 %, the impact strength increases by 18.6%. When GO loading contents is 0.5%, the storage modulus of composites increaseds by 78.3 % and glass transition temperature （Tg） rises by 8.9 ℃. The impact section of GO/ PF in-situ composites is irregular, indicating that the mechanical properties of the PF composites can be improved by addition of GO.

关 键 词：氧化石墨烯 酚醛树脂 原位聚合 复合材料 力学性能 

分 类 号：TQ323.11[化学工程—合成树脂塑料工业]